Can you find out the missing number in the grid?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

Can you solve the photo plexer logic ?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?